ALL THIS TIME I thought that was a
HAT the mystery man was wearing in that old photo of the 'mystery man on the tracks'... IT'S NOT A HAT AFTER ALL, IT'S HIS HAIR and you can tell with CERTAINTY that is the same guy, James Chadwell.. THE MURDERER of those two young girls along the railroad tracks.
MYSTERY SOLVED. Compare the two photos, especially the dude's raised part in his hair in the back.